Contribution of Ca and V to enhancing coking-resistance and stability of MoV/CaO-intercalated montmorillonite catalyst in deoxydehydration of glycerol

被引：6
作者：
Li, Cheng Cang [1 ,2 ,3 ]
Li, Da Jian [1 ,2 ,3 ]
Yin, Shu Tian [1 ,2 ,3 ]
Wang, Ze Zhen [1 ,2 ,3 ]
Liu, Chen Lan [1 ,2 ,3 ]
Zhou, Chun Hui [1 ,2 ,3 ]
机构：
[1] Zhejiang Univ Technol, Coll Chem Engn, State Key Lab Breeding Base Green Chem Synth Techn, Res Grp Adv Mat & Sustainable Catalysis AMSC, Hangzhou 310032, Peoples R China
[2] Qing Yang Inst Ind Minerals, Qing Yang 242804, Peoples R China
[3] Zhejiang Inst Geol & Mineral Resources, Engn Res Ctr Nonmet Minerals Zhejiang Prov, Hangzhou 310007, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2023年 / 665卷
基金：
中国国家自然科学基金;
关键词：
Glycerol; Allyl alcohol; Deoxydehydration; Coking-resistance; Montmorillonite; Molybdenum-vanadium; BIOMASS-DERIVED POLYOLS; ALLYL ALCOHOL; ACRYLIC-ACID; CONVERSION; ACROLEIN; DEOXYGENATION; DEHYDRATION; CHEMICALS;
D O I：
10.1016/j.apcata.2023.119355
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Glycerol can be converted to allyl alcohol via deoxydehydration using molybdenum-vanadium, rhenium and iron based catalysts. However, the dehydration causes severe coking at strong acid sites on the surface of catalyst. Molybdenum-vanadium oxide supported on calcium oxide-intercalated montmorillonite (MoV-CaMMT) was prepared by oxalate anion intercalation followed by impregnation. MoV-CaMMT displayed the best catalytic performance of 86.5% glycerol conversion and good stability in 5 h. Correlating the results of XRD, XPS and TG analysis, it can be demonstrated that the addition of CaO in the catalyst preparation is conducive to the crystallization and dispersion of vanadium oxides, and reduces the acid strength, while the presence of a few vanadium dioxide and the stable conversion of V4+ and V5+ are the reasons for enhancing coking-resistance of MoV-CaMMT. Additionally, NH3-TPD analysis proved the coexistence of weak and strong acid sites in MoVOx, which are conducive to the formation of acetol.
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页数：8
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